Overinflation-preventing apparatus



March- 1, 1927. 7 1,619,383 c. G. TIEFEL ovER INFLATION PREVENTING APPARATUS Original Filed June 11, 1924 ZSheets-Sheo 1 48 40- 52 5.? i5 B IN V E N TO R lharie s 6. flz-Ik.

BY V

my ATTORNEYS March 1 1927.

c, e. TIEFEL OVER INFLATION PREVENTING APPARATUS Original Filed June 11, 1924 INVENIOR C'tzarles G. rwfvlr BY I 121 /5 ATTORNEY Patented Mar. 1, 1927.

UNITED STAT CHARLES G. TIEFEL, OF ROCHESTER, NEW YORK.

ovERINpLATIon-rREvENrINe APPARATUS.

Continuation of application Serial No. 719,454, filed June 11, 1924. This application filed June 16, 1925.

Serial No. 37,585.

The present invention relates to an over inflation preventing apparatus, this application being a continuation of an application filed .by me on J une 11th, 1924, Serial No.

719,454. An object of this invention is tov provide a simple and inexpensive construction in which the user may quickly adjust the apparatus to operate at a predetermined pressure and cut off the supply of air to the device being inflated. Another object of the invention is to provide a construction in which thevalve normally tends to more to closed position and is held out of closed position by a detent which is subject to op -ration by a mechanism responsive to pressure in the device being inflated. Still another object of the invention is to provide an improved device responsive to the pressure in the device being inflated. Still a further object of the invention is to provide a novel means of adjusting the weight on a movable lever from the exterior of acasing enclosing said weight and lever, the lever controlling the air supply valve and being moved by a device responsive to the air pressure in the device being supplied with air. Still another and further object of the invention is to prevent the user of the machine oversupplying the air by holding down the operating or controlling member. Another and still further object of the invention is to provide a connection between the valve and the controlling member which will become automatically broken when the valve is opened to permit the valve to close independently of said controlling member. after the desired pressure has been obtained in the device being inflated. Still another and further object is to provide an indicating device which will be exposed when the valve is open and hidden when the valve is closed.

To these and other ends, the invention consists of certain parts and combinationsof parts, all of which will be hereinafter described: the novel features being pointed out in the appended claims.

In the drawings:

Fig. l is a view of the over-inflation preventing, apparatus in front elevation;

Fig. 2 is a rear view of the apparatus with parts in section, the valve being shown open;

Fig. 3 is a similar view showing the valve closed and the other parts of the'apparatus in the position they occupy at the release of the valve;

Fig. 4 is a vertical section on the line i.4, Fig. 3; and

Fig. 5 is a detail View showing the valve operating means. J

Referring'more particularly to the illustrated embodiment of the invention, 1 indicates a casing which may have an open back, and ears 2 by which the casing may be secured to any suitable support, one of said ears having a pin or hook 2 on which the hose mayv be hung. The outlet of the air pump is connected to the inlet 3 of this apparatus and this inlet leads to a valve 4, in this instance of the turn plug type. valve preferably has an arm 5 thereon to which a spring 6 is connected at T, the other end of the spring being anchored at 8 to the front wall of the casing. This spring tends to move the valve to the closed position illustrated in Fig. 3.

an operatingor controlling handle or member may be provided which turns on theshaft of the valve 4 on the outside of the casing. Preferably also mounted on the valve shaft is an arm 10 which is rigidly secured so as to turn or swing with the rotary member of the valve. This member 10 has a hub 11 proyided with a notch 12 and for cooperation with the walls of this notch there may be provided a detent 13 pivoted at 14 to the I t In order-t0 'efi'ect the opening of the valve,

wise to itslimit, the valve 4 will be opened and the arms 9 and 10 will swing together..

When the arms 9 and 10 reach t e limit of their openin movement a stop 21 which projects from t e housing 1 through a slot in the lever or arm 10 will cooperate with the upwardly projecting arm ofthe detent 13 and throw the nose 19 out of the notch 12. This breaks connection between the operating member 9 and the valve 4 so that it is impossible for the user of the apparatus to hold or maintain the valve open. Immediately upon the release of the lever or operating member 9, a spring 23 which is anchored at 8 connects with a projection 24 on the housing of the opening member through an opening 25 in the casm 1, throws the lever 9 back to its origina osition wh le the lever or member 10 maintains its osition through a means to be described to indicate to the user that the air is on. After the desired air has been supplied to the tire the valve is closed by the spring 6 in a manner to be described and this lever 10 moves to its ori inal position back of the lever 9. Wit 1 the end in view of holding the valve 4 in its open position, a detaining means may be provided comprising, in this instance, a double arm detent 26 pivoted at 27 within the housing or casing l and having at one end a laterally projecting roller 28 which is adapted to enter a notch 29 in the end of the arm 30 secured to the shaft of the valve 4 to lock the valve in open position. For manual displacement of this detent 26 an extension 31 ma be provided on the de tent which lies ad acent a finger operated plunger 32 guided in the side wall of the ousmg 1.

Means may also be rovided for eifectin the closin of the va ve when the desire amount 0 inflation in the tire or other device is obtained. This means, in this instance, comprises a lever 33 pivoted at 34 within the casing 1 and havingone arm provided with an adjustable member in the form' of a screw 35 one end of which cooperates with the detent 26. The head 36 of this screw is arranged adjacent an opening 37 in the casing 1 so that the screw may be 'readily adjusted and a set screw 38 holds the screw 35 in its adjusted position, the set screw also being situated adjacent an pening indicated at 39, so that the set screw.

may be controlled from the exterior of the casing 1. The other end of the lever is adapted to cooperate with two stops 40 and 41 arranged respectively to limit the upper and lower movement of said lever. Movable on this lever is a weight 42 which is bifurcated and has rollers 43 in the bifurcation for cooperating with the upper and lower notches or recesses are characters 48-indicating pounds. Movable in the slot is an indicator which has a pointer 49 anda curved any one of the notches 47. A link 52 rigidly connects with the indicator and is pivoted at 53 to the weight so that as the indicator is moved along the slot in the plate 45, the weight 42 will be shifted along the lever 33. When in a notch, the link forms a connection which permits the weightto move relatively to the pointer or indicator.

Preferably beyond the valve 4 at a point in advance of the outlet 54 for the air is a device responsive to the pressure of the air in the tire or the device to be inflated. This pressure responsive device acts upon the lever 33 to shift said lever when the desired air pressure, as determined by the adjustment of the weight, has been obtained. pressure responsive device, in this instance, comprisesa chambered casting 55 connected with the valve 4 and with the outlet 54 by piping 56. A cylinder 57 with an integral concave flange 58 at its lower end rests on an annular flange 59 formed about an opening in the top of a chambered casting 55, being held to said flange by a retaining ring 60. Between the annular flange 59 and the concave flange 58, the edge of a diaphragm 61 is secured to form a packing and, at the same time, to close the lower end of the cylinder 57. In the cylinder 57 a plunger 62 is mounted to slide, the lower end of this plunger resting upon the diaphragm 61- which is flexible and is responsive to the pressure in the chambered casting55 as well as the tire or device being inflated. The pressure on this diaphragm is consequently transmitted to the plunger 62 and the plunger 62 has at its upper end an adjustable seat 63 engaging the lever 33 in proximity to its pivot 34 and transmitting to such lever the pressure of the air in the device being inflated.

Upon the release of the valve 4 to permit the closing of the latter, the detent 26 cooperates with a striker 64 pivoted at 65 and adapted to cooperate with a bell '67 to. notify the user of the apparatus that the apparatus has ceased supplym air to the tire.

The operation 0 the invention may be understood from the foregoing description, but it may be summarized as follows: One desiring to supply air to a suitable device connected to the outlet 54 pulls the lever 9 clockwise. This, through the detent 13, turns the valve 4 to open the same and supply air to such device. As the hand lever 9 moves clockwise the arm 10 rigid with the shaftof the valve likewise moves clockwise; When the arm 9 has reached its farthest position to the right, the detent 13 enga es the stop 21 and connection is automatically The a broken between the arm 9 and the valve, so that the valve cannot be held open by the lever 9. If the user releases the lever 9, the latter immediately returns to its initial posit-ion under the action of the spring 23.

The arm 10 maintains its shifted position so long as the valve remains open and with the closing of the valve passes behind :the lever 9. This arm 10 therefore acts as an indicator to point out, whether air is being supplied or not. As the valve moves to open position, the detent 26 enters into interlocking connection with the arm 30 on said valve and holds the valve in open position until released. After the pressure which has been determined by the adjustment of the weight 42 has been obtained in the device to be inflated, this pressure will through the diaphragm 61 be communicated to the plunger 62 and the latter will shift the lever 33 to cause the detent 26 to release the valve 30, so that the latter may under the action of the spring 6 move to closed position.

V hat I claim as my invention and desire to secure by Letters Patent is 2-- 1. Anover-inflation preventing apparatus comprising a valve controlling the supply of air to the device to be inflated, means for holding the valve normally closed, a detent for holding the valve open, means for opening the valve independently of said detent, mechanism responsive to the air pressure in the device being inflated, and a connection between said mechanism and the detent normally lying out of engagement with the latter and shifted into said engagement by said pressure responsive mechanism when the latter is operated by pressure in the device being inflated.

2. An over-inflation preventing apparatus comprising a valve controlling the supply of air to the device being inflated and normally tending to move to closed position, manually operable means for moving said valve to open position, a detent arranged to hold said valve in open position after it has been moved to such position, a lever for releasing said detent to permit the valve to close, means responsive to air pressure in the device being inflated, a lever moved by said means in one direction upon the inflation of a device, said lever normally lying out of engagement with the detent, and a weight adustable on said lever.

3. An over inflation preventing apparatus comprising a valve controlling the supply of air to the device being inflated, a lever controlling said valve and having a fixed fulcrum, a weight adjustable on said lever toward and from the fulcrum, means responsive to the pressure in the device being inflated. for effecting the movement of the lever against the action of the weight, and means for eflecting the movement of the weight relatively to the fulcrum, embodying shi ting the indicating position of the indicator.

4. An over inflation preventing apparatus comprising a valve for controlling the supply of air to the device being inflated. a lever controlling said valve, a weigh-t adjustable on the lever relatively to the fulcrum thereof, means responsive to the pressure in the device being inflated for effecting the movement of the lever, a member formed with a plurality of notches, an indicator mounted to rock in said notches, and a link connecting said indicator with the weight through which the weight may be adjusted along the lever. v

5. An over inflation preventing apparatus comprising a casing, a valve arranged in the casing and controlling the supply of air to the device being inflated, a detent for holding the valve open arranged in the easing. mechanism arranged in the casing and responsive to the pressure of air in the device being inflated, said mechanism having controlling connection through the dctentfor effecting the operation of the latter, and a device operable from the exterior of the casing for eflecting the release of the detent independently of said mechanism.

6. An over inflation preventing apparatus comprising a valve for controlling the supply of air to the device to be inflated, a (le tent for holding the valve open, means reonsive to the pressure of the air in the dev ce being inflated for effecting the operation of the detent to release the valve, operating means through which the valve is opened, and means for automatically break ing connection between such operating means and the valve after the valve is open, to prevent the valve being held open by such operating means.

7. An over inflation preventing apparatus comprising a valve forcontrolling the supply of air to the device to be inflated, a detent for holding the valve open, means responsive to the pressure of air in the device being inflated for effecting the operation of said detent to release said valve, a controlling member, a detent for establishing connection between the controlling member and the valve, whereby the valve may be moved to open position, and means for effecting the operation of the detent to break connection between the valve and the controlling member as the valve is opened so that the controlling member cannot hold the valve in open position.

8. An over inflation preventing means comprising a rotary valve for controlling the tion, means responsive to the pressure of air such valve, and means cooperating with the;

detent as the valve is moved to its open position to breakronn ection between the lever and the valve in order to permit the valve to close independently of such lever.

9. An over inflation preventing means comprising a rotary valve for controlling the supply of air to the device being inflated, a detent for holding the valve in open position, means responsive to the pressure of air in the device being inflated for effecting the operation of the detent to permit the valve to close, a lever mounted to swing about the axis of turning of the valve, a detent carried by the lever and adapted to cooperate with the valve to effect the opening movement of such valve, means cooperating with the detent as the valve is moved to its open position to break connection between the lever and the valve in order to permit the valve to close independently of such lever, and

,connecting such controlling member with the valve to permit the controlling member to move the valve to open position, means acting on such detent to cause the connection between the controlling lever andthe lever to be broken when the valve isopened, a spring for moving said controlling member to its initial position, and an indicator hidden by the controlling member when the latter is in its initial position and the valve is closed, said indicator being connected to the valve to move to indicating position as the valve is opened by the controlling member and to occupy such position as long as the valve is open.

CHARLES G. TIEFEL. 

